| Pike, R. Personal Communication, April 2000. |
....mode; instead, user and system data objects are treated equally by the collector. This lack of a clear distinction between user and system objects caused problems: aside from making it impossible to forcefully terminate applications in all circumstances, it led to a system that was harder to debug [59]. 6.3.4 Extensible Operating Systems SPIN : SPIN [10] is an operating system kernel into which applications can download application specific extensions. These extensions provide application specific services; for instance, an in kernel video server can take video packets directly from the ....
Pike, R. Personal Communication, April 2000.
....were mostly uniprocessor or small scale multiprocessor systems trying to scale up to larger systems. Other workon locality issues in operating system structure were mostly either done in the context of earlier non cachecoherent NUMA systems [8] or, as in the case of Plan 9, were not published [25] . Two projects that were aimed explicitly at large scale multiprocessors were Hive [7] and the precursor to Tornado, Hurricane [30] Both independently chose a clustered approach by connecting multiple small scale systems to form either, in the case of Hive, a more fault tolerant system, or, ....
R. Pike. Personal communication.
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